Journal of Fluorescence最新文献

{"title":"Photovoltaic Performance of the Additional Acceptor Impact in D-1 Structured Molecules for Dye-Sensitized Solar Cells via TD-DFT Study.","authors":"A Arunkumar, Rodouan Touti, Mohamed Saad","doi":"10.1007/s10895-026-04918-x","DOIUrl":"10.1007/s10895-026-04918-x","url":null,"abstract":"<p><p>In this work, seven newly designed donor-acceptor1-spacer-acceptor2 (D-A1-π-A2) structured metal-free efficient organic compounds (A1-A7) were designed and tested for dye- sensitized solar cells (DSSCs). The D, π, and A groups were presented in (E)-2-(3-((E)-4-(dimethylamino)styryl)-5,5-dimethylcyclohex-2-enylidene)-2-cyanoacetic acid (D-1). The additional A components have been incorporated into the D-1 structure, and their influence on DSSC applications has been examined. Time-dependent density functional theory (TD- DFT) was used to determine the maximum absorption wavelength (λmax) of D-1 using hybrid functionals with a 6-311 + + G(2d,2p) basis set. According to these findings, TD-CAM-B3LYP used the same basis set and adhered to the optical λmax values for A1-A7. The solvent acetonitrile effects were followed in the literature with a conductor-like polarizable continuum model (C-PCM). The DFT and TD-DFT approaches were used to thoroughly study the molecular orbitals (MOs), λmax, and photovoltaic (PV) parameters of the molecules A1-A7. The computed results showed that all designed dyes offered better A-groups in D-A1-π-A2 sensitizers. The improved electronic transition, red-shifted λmax, and good PV characteristics of that structure make it a suitable chromophore for DSSCs.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5579-5587"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148905519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Efficiency Fingerprint Detection Based on Eu³⁺-Doped AgYMo₂O₈ red Phosphors Optimized by Hydrothermal Method.","authors":"Jing Liu, Ya Yang, Tianle Liu, Anlin Zhang, Bin Deng, Ruijin Yu","doi":"10.1007/s10895-026-04917-y","DOIUrl":"10.1007/s10895-026-04917-y","url":null,"abstract":"<p><p>In forensic science, latent fingerprints represent a crucial type of evidence for individual identification. Nevertheless, the features of such fingerprints exist at a microscopic scale. The application of fluorescent powder during the development of latent fingerprints can markedly improve image contrast while reducing background interference, thus enabling the acquisition of high-quality fingerprint images. In the present work, AgYMo₂O₈:Eu³⁺ red fluorescent powder was successfully synthesized using both solid phase and hydrothermal methods. X-ray diffraction (XRD) together with Rietveld refinement was employed to confirm the phase structure of the obtained samples. A high energy absorption efficiency exists within the charge transfer band from [MoO₄]^2- to Eu³⁺, which leads to efficient red-light emission and the production of a high contrast background light. Under excitation at 465 nm, the Eu³⁺ doped samples exhibit red emission at 616 nm, with an optimal doping concentration determined to be 0.40 mol. The primary mechanism behind concentration quenching is the interaction between the nearest neighboring ions. The prepared samples possess high thermal stability and outstanding thermal stability. After five thermal cycles, the luminescence intensity of the material recovered to approximately 99%. Among the two methods, the samples optimized by the hydrothermal route display a homogeneous particle size distribution and good dispersion. These samples can clearly reveal the level I to level III structures of fingerprints and are well suited for fingerprint visualization on various substrate materials. Overall, both synthesis approaches yielded powders that showed excellent sensitivity, selectivity, and contrast accompanied by minimal background interference. These results fully demonstrate the application potential of AgYMo₂O₈:Eu³⁺ in the field of latent fingerprint imaging.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5629-5647"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148919353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of a New Lanthanide-Based Nanomaterial as Multifunctional Bio-Probes for in Vivo Imaging.","authors":"Lei Mu, Xinyu Ding, Chenchen Xue, Ying Tao, Qingqing Tang, Huaiting Wang, Miaomiao Zou, Yafang Cao, Yifu Mao, Lijun Xiang","doi":"10.1007/s10895-026-04934-x","DOIUrl":"10.1007/s10895-026-04934-x","url":null,"abstract":"<p><p>Bioimaging has promising prospects for clinical diagnosis. However, single-modal bioimaging can not satisfy the high demands of diagnostic information. Herein, we constructed a novel lanthanide-based bio-probe Sr₂NdF₇: Er³⁺/Tm³⁺ (abbreviated as SNF) for dual-modal imaging diagnosis. The obtained SNF exhibited a small size of ~ 24 nm, intense upconverted luminescence (UCL), excellent X-ray absorption capability and superior biocompatibility. Importantly, SNF could successfully realize UCL and CT imaging in vivo/vitro. Notably, SNF didn't accumulate in the body for a long time and could be completely metabolized out from the body, which possessed the high safety of in vivo application. Collectively, SNF has promising potential in application for non-invasive diagnostic imaging. This work facilitates the translation of lanthanide-based materials in clinical applications.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5787-5797"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148963073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photoluminescence and Structure-property Relationships in Alkynyl-functionalized Ni(II) and Zn(II) Salicylaldimine Complexes.","authors":"Aditi V Shinde, Sanjay S Chavan","doi":"10.1007/s10895-026-04930-1","DOIUrl":"10.1007/s10895-026-04930-1","url":null,"abstract":"<p><p>A series of alkynyl-functionalized salicylaldimine ligands bearing H, NO₂, and OCH₃ substituents and their corresponding complexes [Ni(L_1-3)] (1a-c) and Zn(L_1-3)] (2a-c) were synthesized and characterized by spectroscopic, thermal, electrochemical, and photophysical techniques. Metal coordination produced red-shifted absorption and emission bands and enhanced fluorescence relative to the free ligands. Among the investigated derivatives, the OCH₃-substituted complexes showed the highest emission intensity, lifetime, and quantum yield, consistent with the electron-donating nature of the substituent and the extended π-conjugated framework. The Ni(II) complexes exhibited substituent-dependent quasi-reversible redox behavior. All complexes showed moderate SHG activity, with only small variations among the different substituents. Overall, the results demonstrate systematic but relatively modest structure-property relationships, arising from the combined effects of metal coordination, π-conjugation, and ligand substituents on the photophysical, electrochemical, and nonlinear optical properties of the complexes, highlighting their promising their photonic and optoelectronic applications.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5799-5811"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148977090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A \"Turn-on\" Schiff base Fluorescent Probe for Recognizing Al³⁺ and its Application.","authors":"Ping Yu, Shanbin Liu, Min Li, Jie Yin, Tianrun Dai, Jinghan Mao, Yu Zhao","doi":"10.1007/s10895-026-04932-z","DOIUrl":"10.1007/s10895-026-04932-z","url":null,"abstract":"<p><p>A fluorescent probe, DZM, was synthesized via a dehydration condensation reaction using 2-hydroxy-1-naphthaldehyde and 9-fluorenylmethyl carbazate as starting materials. The DZM solution exhibited a significant fluorescence enhancement (297-fold) upon the addition of Al³⁺, along with high selectivity for this ion. The calculated detection limit was as low as 0.81 nM, which was much lower than most of the values reported, demonstrating high sensitivity. The binding stoichiometry between DZM and Al³⁺ was confirmed to be 2:1 by Job's plot and ¹H NMR, and the sensing mechanism was elucidated, which was further supported by Gaussian calculations confirming the presence of a photoinduced electron transfer (PET) process. Furthermore, the probe DZM was successfully employed in biological experiments and cellular fluorescence imaging.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5813-5827"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148982875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Near-infrared Fluorescent Probe for Sensitive Detection of Viscosity in Biosystems and Beverages Spoilage.","authors":"Yu Zhu Yang, Gui Yong Li, Nan Jun Huang, Huan Li Liu, Xin Dai","doi":"10.1007/s10895-026-04947-6","DOIUrl":"10.1007/s10895-026-04947-6","url":null,"abstract":"<p><p>Viscosity is a key parameter for the quality of liquid foods and is also closely related to the occurrence of various diseases in biological systems. Therefore, real-time monitoring of microviscosity changes in food and intracellular is of great significance. In this paper, a near-infrared viscosity probe (CDM) was exploited, which enables highly specific and sensitive monitoring of viscosity changes in food and intracellular environments. The CDM exhibits a 27-fold enhancement in fluorescence intensity under high-viscosity conditions, demonstrating excellent sensitivity and selectivity, along with superior photostability and biocompatibility. Probe CDM was applied to monitor the viscosity changes induced by Nystatin and Momantin in liver cancer cells and effectively monitored the dynamic changes of intracellular viscosity in APAP-induced liver injury. Furthermore, this probe has successfully measured the viscosity changes of two different juices during spoilage. These research results indicate that CDM can serve as a novel analytical method for monitoring the viscosity changes of beverage spoilage during the spoilage process, and also as a reliable tool for early diagnosis of liver diseases and exploration of their underlying pathogenesis.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5887-5899"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149030681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Donor-only Triads Exhibiting Room Temperature Phosphorescence as Hosts for Red Electroluminescent Devices.","authors":"Oleksandr Bezvikonnyi, Viktorija Andruleviciene, Ronit Sebastine Bernard, Dmytro Volyniuk, Alena Kimpel, Bo-Yen Lin, Chia-Hsun Chen, Jing-Xiang Huang, Chi-Feng Lin, Tien-Lung Chiu, Jiun-Haw Lee, Kuan-Lin Yeh, Juozas V Grazulevicius","doi":"10.1007/s10895-026-04935-w","DOIUrl":"10.1007/s10895-026-04935-w","url":null,"abstract":"<p><p>Aiming to explore donor-based host materials for phosphorescent organic light emitting diodes (PhOLEDs), four donor*-donor-donor* type compounds were designed using typical electron-donating moieties with the different electron-donating abilities (phenothiazine, phenoxazine, 9,9-dimethylacridine or dibenzo[b,f]azepine). The molecular design strategy resulted in the synthesis of the compounds with relatively low ionization energies of 5.1-5.45 eV, which are favourable for efficient hole injection. The synthesized compounds demonstrate relatively good hole transporting properties with hole drift mobilities exceeding 1 × 10^- 4 cm² V^- 1 s^- 1 at electric field of 1.6 × 10⁵ V/cm. Their triplet energies of the compounds are in the range of 2.61-3.08 eV ensuring effective triplet exciton confinement and preventing reverse energy transfer from red phosphorescent emitter to the host. Red PhOLED with the developed 9,9-dimethylacridine-carbazole-9,9-dimethylacridine as the host shows the increase of external quantum efficiency by 35% when compared to that of the device with the previously reported host as a reference. It is higher than that of the reference device with previously reported 9'-(2-ethylhexyl)-9'H-9,3':6',9''-tercarbazole as the host. The molecular mixture of the phenothiazine-carbazole-phenothiazine derivative in Zeonex show room temperature phosphorescence. The triplet emission of the system is significantly quenched upon interaction with picric acid, indicating its sensitivity toward nitroaromatic compounds.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5683-5694"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148920104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Coumarin-Schiff Bases: Synthesis, Electrochemical Behavior, Anion/Cation Sensing Capacities, Spectroscopic Analysis, DFT Studies and NLO Properties.","authors":"Ergin Keleş, Demet Uzun, Furkan Kılıçarslan, Ayşe Sungur, Ebru Aktan","doi":"10.1007/s10895-026-04926-x","DOIUrl":"10.1007/s10895-026-04926-x","url":null,"abstract":"<p><p>This study reports the design, synthesis, and comprehensive experimental and theoretical investigation of a series of novel, cost-effective fluorescent Schiff base chemical sensors based on a high-emission 7-(N, N-diethylamino)coumarin fluorophore core. Three different derivatives containing pyrimidine (1a), 4-fluorophenyl (1b), and 2,4-difluorophenyl (1c) moieties were designed to systematically evaluate ion detection performance, intrinsic stability, and the effects of electronic modulations on electrochemical pathways. Within the series, sensor 1a demonstrated exceptional selectivity and sensitivity to Cu²⁺ and Ni²⁺ via a visible fluorescence shutdown mechanism. Importantly, the 1a-Cu²⁺ ensemble acts as a reversible cascade sensor for the highly toxic cyanide anion via a metal substitution mechanism, recovering its original intense fluorescence with a noticeable yellow-to-orange color shift visible to the naked eye. In DMSO, the LOD values were 1.51 µM for Cu²⁺ and 2.76 µM for Ni²⁺. The sensing performance of 1a was also retained in highly aqueous media containing 90% distilled or tap water. The corresponding LOD values were 1.22 and 4.16 µM for Cu²⁺ and 4.22 and 1.93 µM for Ni²⁺ in distilled and tap water, respectively. The Cu²⁺/CN^- turn-off/turn-on response was also preserved in both aqueous media. Cyclic voltammetric (CV) analysis revealed irreversible, diffusion-controlled redox properties. Experimental HOMO/LUMO energy gap values closely correlated with trends predicted by DFT calculations. Furthermore, the calculated hyperpolarizations (β) for 1(a-c) are 91, 30, and 9 times higher, respectively, than those of the reference urea standard. These findings demonstrate that the synthesized coumarin-based Schiff bases have enormous potential not only as selective \"naked-eye\" detectable chemical sensors but also as high-performance candidate materials for advanced nonlinear optics (NLO) applications.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5755-5773"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148944990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fluorescent Chemosensors as Precision Tools for Bioimaging and Environmental Monitoring: Advances, Challenges, and Future Directions.","authors":"Duraisamy Udhayakumari","doi":"10.1007/s10895-026-04921-2","DOIUrl":"10.1007/s10895-026-04921-2","url":null,"abstract":"<p><p>Small-molecule fluorescent chemosensors have emerged as prevailing tools for bioimaging, offering high sensitivity, rapid response, and tunable photophysical properties. This review provides a critical overview of recent advances in the design and bioimaging applications of organic fluorescent probes derived from chemosensors. The key photophysical transduction mechanisms-including photoinduced electron transfer (PET), intramolecular charge transfer (ICT), Förster resonance energy transfer (FRET) and excited-state intramolecular proton transfer (ESIPT)-are systematically discussed in relation to sensing performance and imaging capability. Significant progress in the detection of toxic metal ions (Al³⁺, Cu²⁺, Zn²⁺, Hg²⁺, Fe³⁺, Cr³⁺, Cd²⁺, Pb²⁺), biologically relevant anions (CN⁻, F⁻, S²⁻, PPI), and pH variations is highlighted, with particular emphasis on coumarin-, quinoline-, and Schiff base-based probes for cellular and in vivo imaging. Emerging innovations such as ratiometric sensing, subcellular targeting, near-infrared fluorescence, and smartphone-integrated detection platforms are discussed. Despite remarkable advances, challenges including limited aqueous solubility, photobleaching, background interference, and biocompatibility persist. This review bridges fundamental photophysical principles with practical bioimaging applications, serving as a valuable resource for next-generation fluorescent sensor development.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5649-5682"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148920098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solvent-Free Ground Thiadiazole Schiff Base Fluorescent Probe for Selective Detection of Dichromate with DFT Mechanism Investigation.","authors":"Yuting Liu, Qian Yu, Dawei Yin, Shuaiqi Wang, Liangyan Qiao, Jiale He, Dangtong Zhang","doi":"10.1007/s10895-026-04942-x","DOIUrl":"10.1007/s10895-026-04942-x","url":null,"abstract":"<p><p>(E)-1-Phenyl-N-(5-phenyl-1,3,4-thiadiazol-2-yl)methanimine (probe Y) was synthesised via solvent-free, solid-phase grinding, using 2-amino-5-phenyl-1,3,4-thiadiazole and benzaldehyde as the starting materials. The probe exhibits excellent selectivity towards the dichromate anion (Cr₂O₇^2-) and generates dual-channel responses, including fluorescence quenching for quantitative detection and a visible colour change of the solution from light green to bright yellow for qualitative naked-eye detection. The probe's sensing performance remains stable over a wide pH range (2-12), with a rapid equilibrium response time (< 5 min). Fourier-transform infrared (FT-IR) and proton nuclear magnetic resonance (¹H NMR) titration experiments suggest that Probe Y interacts with Cr₂O₇^2- with an apparent stoichiometric ratio of 2:1. Density functional theory (DFT) calculations were performed to reveal the probe's intrinsic recognition mechanism, and frontier molecular orbital (FMO) analyses suggest that photoinduced electron transfer (PET) may contribute to the fluorescence quenching process. The fluorescence quenching constant (Ksv) of the probe towards Cr₂O₇^2- is 1.87 × 10⁴ M^- 1, and the fluorescence-based limit of detection is 4.02 µM, demonstrating competitive sensing performance among reported thiadiazole Schiff-base Cr₂O₇^2- probes.</p>","PeriodicalId":15800,"journal":{"name":"Journal of Fluorescence","volume":" ","pages":"5695-5707"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148930103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}